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Pandas DataFrame: first() function

DataFrame - first() function

The first() function is used to convenience method for subsetting initial periods of time series data based on a date offset.

Syntax:

DataFrame.first(self, offset)

Parameters:

Name Description Type/Default Value Required / Optional
offset   string, DateOffset, dateutil.relativedelta Required

Returns: subset - same type as caller

Raises: TypeError
If the index is not a DatetimeIndex

Example:


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